In the December issue of this Journal Peller (1928) presented a critical analysis of my paper (1927). His criticism is both general and specific. The general criticism requires no comment on my part. Polemics have no place in English scientific literature. Any contribution which contains an idea and stimulates thought and investigation is, in my opinion, of sufficient interest to warrant publication, provided the data presented are accurate.

Some comment, however brief, is required because the specific remarks create an impression that not only are the deductions wrong, but that the data on which they are based are inaccurate.